Health Library

Poison Ivy Rash in Children

Poison ivy rash is an allergic reaction to poison ivy. Poison ivy is very a common plant in the U.S. It is similar to two other plants called poison oak and poison sumac. The plants cause allergic dermatitis.

Poisons and Children

Detailed information on poisoning, preventing poisoning and how to respond in an emergency

Polio Vaccine (Inactivated Polio Vaccine; IPV)

The poliovirus destroys the nervous system, causing paralysis. Today, polio is extremely rare in the United States because of the polio vaccine. It's still common in other countries, though, so children still need to be immunized.

Poliomyelitis (Polio) in Children

Polio is a very contagious disease caused by a virus. The virus is most known for causing paralysis. But very few children with polio develop paralysis. Read on to learn more about this condition in children.

Pollen and Children

Learn about pollen, which is the most common cause of hay fever (seasonal allergic rhinitis). Also learn how to reduce the effects of hay fever on your child during pollen season.

Polycystic Kidney Disease

Detailed information on the different types of polycystic kidney disease.

Polycythemia Vera in Children

Polycythemia vera is a serious, but very rare blood disorder in children. Learn about causes, symptoms, diagnosis, and treatment.

Posterior Pituitary Disorders

Detailed information on posterior pituitary disorders

Posterior Urethral Valves in Children

Posterior urethral valves are a problem with the urethra in a boy. The valves partly block urine flow because not enough urine can get through them to leave the body. This can harm the urethra, bladder, ureters, and kidneys.

Postmaturity in the Newborn

The normal length of pregnancy is 37 to 41 weeks. Postmaturity is a word used to describe babies born after 42 weeks. Very few babies are born at 42 weeks or later. Other terms often used to describe these late births include post-term, postmaturity, prolonged pregnancy, and postdates pregnancy.

Postoperative Care

Detailed information on postoperative management

Postpartum Hemorrhage

Postpartum hemorrhage is more bleeding than normal after the birth of a baby. About 1 in 100 to 5 in 100 women have postpartum hemorrhage. It is more likely with a cesarean birth. It most often happens after the placenta is delivered, but it can also happen later.